Refactor TorrentInfoEndpoint to fix JSON encoding issue #3037

Job	Run time
env	1s
gatekeeper	3s
changes	3s
application_tester	0s
documentation	0s
guitest	0s
mac	0s
pytest	0s
ubuntu	0s
windows	0s
coverage_draft / generate and upload	4m 17s
application_tester_draft / run (ubuntu-latest)	4m 28s
guitest_draft / run (windows-latest)	2m 58s
scripttest_draft / run	1m 54s
	13m 44s

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